07-21-2010, 11:41 PM
|
#19
|
|
Come on, cat.
Join Date: Nov 2003
Location: general vicinity of Philadelphia area
Posts: 7,013
|
Presence Of Wolves Allows Aspen Recovery In Yellowstone
Quote:
The wolves are back, and for the first time in more than 50 years, young aspen trees are growing again in the northern range of Yellowstone National Park.
After an absence of 70 years, wolves were re-introduced to Yellowstone Park in 1995, and elk populations began a steady decline, cut in half over the past decade. Also, the presence of a natural predator appears to have altered the behavior of the remaining elk, which in their fear of wolves tend to avoid browsing in certain areas where they feel most vulnerable. The two factors together have caused a significant reduction in elk browsing on young aspen shoots, allowing them to survive to heights where some are now above the animal browsing level.
|
__________________
Crying won't help you, praying won't do you no good.
|
|
|